Brook



(No Model.)

0. S. WESTBROOK.

SUPPORT FOR ROCK DRIL'LS.

No. 312,540. Patented Feb. 17, 1885.

ATTORNEYS N. FEYERS. Plwmmlm m ncr. Washington. u,c.

UNITED STATES PATENT OFFICE.

CHARLES S. VVESTBROOK, OF SPRAGUEVILLE, NEW YORK.

SUPPORT FOR ROCK-DRILLS.

SPECIFICATION forming part of Letters Patent No. 312,540 dated February 17, 1885, Application filed June 19, 1884. Renewed January 28, 1885. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES S. Wnsr BROOK, a citizen of the United States, and a resident of Spragueville, in the county of St. Lawrence and State of New York, have invented certain new and useful Improvements in Supports for Bock-Drills; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure l is a perspective view or" a rockdrill provided with my improved shell. Fig. 2 is a cross-section of the same; and Figs. 3 and 4 are perspective views of the drill-cylinder and the shell separated, showing the shell partly broken away.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to shells for steam or air rock-drills; and it consists in the improved construction and combination of parts of the same, as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A indicates the drill-cylinder, which may be of any suitable construction, and which is preferably round. The sides of the cylinder are provided with two or more longitudinal ribs,B, secured at equal distances from each other parallel with the axis of the cylinder, and having convex outer faces or surfaces, 0, and these ribs fit and slide upon longitudinal concave ways D, secured upon the inner sides of the shell E. This shell incloses the cylinder, and has a longitudinal slit, F, parallel with its axis, which shell has outwardly-projecting flanges G upon its edges adjacent to the slit, which flanges have a number of perforations, H, through which bolts 1 pass, which are provided with nuts J.

The shell and cylinder may be provided with any suitable feeding mechanism, and the shell may be mounted upon a tripod in any approved manner, and it will be seen that the drill will be guided by the ribs sliding in the ways upon the shell, and it will also be seen that as the ribs and ways become worn the bolts passing through the flanges may be tightened, drawing the flanges closer together, which will take up the wear, thus insuring the perfect, true, and steady fit'of the drill in the shell. It follows that the ribs and ways may be made in one piece with the cylinder and shell, or be made separately; butI prefer to make them separately and secure them by means of screw-bolts K.

If desired, the ribs may be V- shaped in section, or have any other suitable projecting shape, and the ways may be of a corresponding shape, and the projecting ribs may be upon the inside of the shell and the ways upon the drill-cylinder without departing from the spirit of my invention.

Having thus-described my invention, I claim and desire to secure by Letters Patent of the United States a 1. The combination of a drill-cylinder having longitudinal ribs upon its sides with a shell inclosing the cylinder, having a longitudinal flanged slot extending from one to another, and having ways for the reception of the ribs of the cylinder upon its inside, and means for drawing the flanged edges of the slotcloser together or farther apart, as and for the purpose shown and set forth.

2. The combination of a drill-cylinder, ribs secured upon the sides of the cylinder parallel with the axis of the same, a shell having a longitudinal slot having flanged edges, means for adjusting the said flanged edges closer together or farther apart, and ways secured upon theinner side of the shell registering with and receiving the ribs upon the sides of the cylinder, as and for the purpose shown and set forth.

3. The combination of a drill-cylinder, ribs upon the side of the same parallel to its axis and having convex faces, a shell having a longitudinal slot, means for drawing the edges of this slot closer together or farther apart, and ways secured upon the inner sides of the shell registering with the ribs upon the cylinder and having concave faces, as and for the purpose shown and set forth.

4. The combination of a drilleylinder hav- In testimony that I claim the foregoing as 1:) ing longitudinal ribs parallel with its axis, a my own I have hereunto affixed my signature shell inolosing the said cylinder, having a 1011- in presence of two Witnesses. gitndinal slot extending from one end to the other, and provided at its edges with out- CHARLES S. \VESTBROOK. wardly-projeoting flanges having perforations,

and nutted bolts passing through the said per- Vitnesses:

forations, as and for the purpose shown and A. L. WOODWORTH,

set forth. 1 S. W. HARRIS. 

